Coevolution of prey-predators, Biology

Predation is a process by which one organism (predator) eats another organism (prey). If the prey population is abundant, the predator population also becomes abundant. If the predators are abundant and efficient, there will be a reduction in the abundance of the prey population. Prey-predator relationships can be visualised as a game in which each player tries to outwit the other. If you consider the prey population, only individuals better adapted to escape predation would survive and reproduce. So in a prey-predator population with varying degrees of efficiency (the variations are genetically determined), the prey species evolve at the avoidance of the predator and the predator species evolves towards maintaining predation and making it more efficient. Such a coevolution of the predator-prey relationship may continue indefinitely over long periods without causing extinction of both the species.

This is achieved by improving the efficiency of the predator and the resistance of the prey in a balanced way. Natural selection aims at a faster improvement of the efficiency of an inefficient predator than the resistance in an already resistant prey. But in a vulnerable victim, the resistance is evolved faster than the efficiency of an already efficient predator. Such balancing acts by natural selection do not allow any one of the two species to win the race.

There are several examples of natural selection having produced complex adaptations as a consequence of long term evolutionary process. These adaptations manifest themselves both among the predators and prey organisms. Examples among the predators are: the long and slimy tongue and the accurate aim of insectivorous lizards; the elaborate webs of the spiders; the social hunting behaviour of the lions. Cryptic toloration, fleetness, noxious substances and toxins, alarm calls and posting of sentinels can be cited as instances of adaptations evolved by prey organisms as defensive measures.

Posted Date: 4/5/2013 6:12:26 AM | Location : United States







Related Discussions:- Coevolution of prey-predators, Assignment Help, Ask Question on Coevolution of prey-predators, Get Answer, Expert's Help, Coevolution of prey-predators Discussions

Write discussion on Coevolution of prey-predators
Your posts are moderated
Related Questions
What is the main difference between a bird heart and a mammalian heart? The bird heart has a one aortic arch on the right side of its body while the mammalian heart has one on

How Inadequate Breast Milk cause protein energy malnutrition? Though prolonged breastfeeding of children is the rule in US, the amount of breast milk secreted in poor Indian mo

If child has same gel positioning as father, would it be likely for the child to get cancer if the father has it? For the children without the mutation, what is the risk of getting

Explain about the Dehydration or Drying? The technique of drying is the oldest method of food preservation practiced by mankind. The removal of moisture, which is actually dehy

Energy Cycle  of Living Being Source of energy :All  matter  locks  energy in the  from of   bonds  between component  molecules and   atoms. This  energy is the chemical  ener

Q. Prevention and cure of botulism involves? The prevention and cure of botulism involves: 1. Strict adherence to safe food-processing practices by the food industry 2.

What are the differences between the two domain

how do i classify mythical creatures into a web?

The allele that causes albinism (p) is recessive to the allele for normal pigmentation (P). A normal woman whose father is an albino marries an albino man whose parents are both no

What ions must a plant obtain from the soil in order to make (a) ATP, (b) chlorophyll?   (a) To create ATP (adenosine triphosphate) a plant requires a supply of phosphate io